CN105837142A - Micro-expansive coral sand concrete and preparation method thereof - Google Patents

Micro-expansive coral sand concrete and preparation method thereof Download PDF

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Publication number
CN105837142A
CN105837142A CN201610251919.7A CN201610251919A CN105837142A CN 105837142 A CN105837142 A CN 105837142A CN 201610251919 A CN201610251919 A CN 201610251919A CN 105837142 A CN105837142 A CN 105837142A
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parts
coral sand
concrete
sand concrete
swelling agent
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CN105837142B (en
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陈友治
马章强
孙涛
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Wuhan University of Technology WUT
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Wuhan University of Technology WUT
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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C04B28/08—Slag cements
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B14/02—Granular materials, e.g. microballoons
    • C04B14/04—Silica-rich materials; Silicates
    • C04B14/06—Quartz; Sand
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
    • C04B22/002—Water
    • C04B22/0026—Salt water, e.g. seawater
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C04B28/04—Portland cements
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
    • C04B40/0028—Aspects relating to the mixing step of the mortar preparation
    • C04B40/0039—Premixtures of ingredients
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Civil Engineering (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

The invention discloses a micro-expansive coral sand concrete and a preparation method thereof. The micro-expansive coral sand concrete is composed of the following components in parts by weight: 300-450 parts of cement, 15-45 parts of admixture, 600-725 parts of coral sand, 975-1150 parts of macadam, 165-205 parts of seawater, 3-7 parts of water reducing agent and 1.5-2.5 parts of liquid expanding agent. The main component of the liquid expanding agent is an emulsion generated by saponifying higher fatty acids. The novel concrete admixture liquid expanding agent is utilized to obviously enhance and improve the dry shrinkage and volume stability of the concrete. The double expansion effects sufficiently enhance the compactness of the concrete, and effectively repair and improve the porosity of the concrete, thereby ensuring the volume stability of the coral sand concrete.

Description

A kind of microdilatancy type coral sand concrete and preparation method thereof
Technical field
The invention belongs to building material technical field, be specifically related to a kind of microdilatancy type coral sand concrete and preparation method thereof.
Background technology
From cement concrete material invention application so far, its research and application experienced by the development of nearly 200 years.Its application is very Extensively, relating to the engineering constructions such as highway, railway, bridge, tunnel, ocean, country was to Reef in Chinese South Sea resource the most in recent years Attention and development so that concrete material has had widely display stage in ocean engineering.By geographical position and the shadow of environment Ringing, the resource on the most of islands and reefs in the South Sea needs development and utilization, ocean islands and reefs engineering build the utilization be unableing to do without concrete, Piling up on islands and reefs and have substantial amounts of Corallium Japonicum Kishinouye aggregate such as coral reef, coral sand, this special Corallium Japonicum Kishinouye aggregate is exploitation ocean engineering construction Provide abundant raw material resources.Continuous for South China Sea islands controversial issue in recent years, the most more should be raw on protection island On the premise of state environment, utilize the coral sand of islands and reefs or periphery to prepare coral concrete, be so possible not only to save Financial cost, The source of aggregate can also be solved, ocean engineering construction is had very important significance and is worth.
Compared with common fluvial sand, coral sand has higher water absorption rate and porosity, and this allows for preparing coral sand concrete Time need to strengthen water consumption and water reducer consumption.Although it is good etc. excellent that the coral sand concrete of preparation has light weight, heat preservation and insulation Point, but easily cause more greatly dry shrinkage because of water requirement very fast, the defects such as intensity is relatively low and volume stability of concrete is bad, this Sample will can produce ill effect to the long durability of coral sand concrete.Build in ocean engineering to give full play to coral sand If effect, we need badly and take technological means and measure to tackle this phenomenon and problem.
Summary of the invention
Present invention aim at improving existing coral sand concrete, prepare that a kind of intensity is high, that volume stability is good is micro-swollen Swollen type coral sand concrete.
For reaching above-mentioned purpose, use technical scheme as follows:
A kind of microdilatancy type coral sand concrete, its composition meter by weight is as follows:
The cement of 300～450 parts, the admixture of 15～45 parts, the coral sand of 600～725 parts, the rubble of 975～1150 parts, 165～205 The sea water of part, the water reducer of 3～7 parts, the liquid swelling agent of 1.5～2.5 parts；
Wherein, the main component of described liquid swelling agent is the emulsion that higher fatty acids generates through saponification.
By such scheme, described liquid swelling agent is prepared as follows:
Adding higher fatty acids, sodium hydroxide, catalyst, and heated and stirred in reaction vessel, temperature controls at 60～75 DEG C, After reaction 5～8h, add saturated sodium-chloride to remove glycerol and to separate out higher fatty acids sodium；Continue to be heated to 75～90 DEG C, add After opacifiers, diffusant, fully reaction 1～2h, it is cooled to room temperature and add hydrochloric acid to be neutralized to pH value be about 7.0, filter and separate Obtain liquid swelling agent.
By such scheme, its raw materials by weight portion meter is as follows:
By such scheme, described higher fatty acids is at least one in stearic acid, palmitic acid, oleic acid, linoleic acid.
By such scheme, described catalyst is at least one in ethanol, propanol, ethylene glycol, propylene glycol.
By such scheme, described opacifiers be fatty alcohol-polyoxyethylene ether, aliphatic amine polyoxyethylene ether, alkylphenol polyoxyethylene, At least one in phenethyl phenol polyethenoxy ether.
By such scheme, described diffusant is in alkylbenzenesulfonate, alkylnaphthalene sulfonate, alkylsulfonate, alkylphosphonic At least one.
By such scheme, described cement is the one in Portland cement, portland slag cement, composite Portland cement Or two kinds.
By such scheme, described admixture is at least one in metakaolin, graining blast-furnace cinder micro-powder, SILICA FUME.
By such scheme, the modulus of fineness of described coral sand is 2.5～3.0, and bulk density is 1120～1180kg/m3。
By such scheme, described rubble is basaltic broken stone, and bulk density is 1580～1760kg/m3, crush values is 7～9%, Clay content 0.1～0.4%；Described basaltic broken stone is made up of the continuous grading rubble of 0～5mm, 5～10mm, 10～20mm.
By such scheme, described water reducer is that polycarboxylate water-reducer, naphthalene water reducer, aliphatic water reducing agent, sulfamate subtract At least one in water preparation.
The preparation method of above-mentioned microdilatancy type coral sand concrete, comprises the following steps:
By the cement of 300～450 parts, the admixture of 15～45 parts, the coral sand of 600～725 parts, the rubble of 975～1150 parts is put In machine mixer after stirring 1～2min uniformly, then the water reducer of 3～7 parts and the liquid swelling agent of 1.5～2.5 parts are mixed all After even, the sea water in company with 165～205 parts is together poured into, continues stirring 1～2min and uniformly prepares microdilatancy type coral sand concrete.
Liquid swelling agent, as a kind of new additive product, can be effectively improved the shrinkage of coral sand concrete, and it has mixes Measure the features such as little, chloride ion content is low, expand good stability, good, economic and environment-friendly with other additive suitabilitys.Expansion of liquids The Binder Materials such as the expansion component that agent has in mainly passing through and cement generate the product making concrete produce microdilatancy in early days at hydration reaction Thing carrys out the plastic shrinkage of compensating concrete.
The beneficial effects of the present invention is:
The present invention utilizes the coral sand on the islands and reefs of ocean and sea water to replace common fluvial sand and fresh water, be truly realized raw-material on the spot Utilize, so achieve and reduce raw material cost of transportation and improve purpose and the meaning of coral sand utilization rate.
The present invention utilizes a kind of new concrete additive liquid swelling agent, hence it is evident that improve and improve concrete dry shrinkage and Volume stability, in the use of liquid swelling agent achieves coral sand concrete, Binder Materials hydration rate forms speed with paste structure The synchronization of degree is carried out, and the hydrated product intensity of coral sand inside concrete Binder Materials is relatively low in early days, now the work of liquid swelling agent With the most obvious；And when the aquation later stage, coral sand concrete strength was higher, the effect of liquid swelling agent eases up, the biggest Plastic expansion adds later stage certain expansion, thus achieves the effect of double expansion.Double expansion effectiveness substantially increase coagulation The compactness of soil, effectively makes up and improves the porosity of concrete, thus ensure that the volume stability of coral sand concrete.
Detailed description of the invention
Following example explain technical scheme further, but not as limiting the scope of the invention.
The preparation embodiment of liquid swelling agent:
Embodiment 1
Adding the stearic acid of 115 parts, the sodium hydroxide of 120 parts, the dehydrated alcohol of 0.5 part in flask, heated and stirred is uniform, Controlling heating-up temperature is 70 DEG C, and the response time is 7h；
Add saturated sodium-chloride and separate out sodium stearate, be warming up to 85 DEG C, add the aliphatic amine polyoxyethylene ether of 0.08 part, 0.03 It is cooled to room temperature after the alkylbenzenesulfonate of part, fully reaction 1h；
Add the hydrochloric acid of 50 parts being neutralized to PH is 6.7, obtains emulsion and be liquid swelling agent after filtering separation, impurity removal.
Embodiment 2
In flask, add the oleic acid of 96 parts, the sodium hydroxide of 105 parts, the dehydrated alcohol of 0.2 part, the ethylene glycol of 0.1 part, add Thermal agitation is uniform, and controlling heating-up temperature is 65 DEG C, and the response time is 6.5h；
Add saturated sodium-chloride and separate out sodium stearate, be warming up to 90 DEG C, add the alkylphenol polyoxyethylene and 0.04 of 0.05 part The fatty alcohol-polyoxyethylene ether of part, after the alkylbenzenesulfonate of 0.02 part and the alkylnaphthalene sulfonate of 0.03 part, fully reaction 1.5h It is cooled to room temperature；
Add the hydrochloric acid of 45 parts being neutralized to PH is 6.9, obtains emulsion and be liquid swelling agent after filtering separation, impurity removal.
Embodiment 3
Oleic acid and the linoleic acid of 35 parts, the sodium hydroxide of 130 parts, the ethylene glycol of 0.5 part and 0.3 of 85 parts is added in flask The propylene glycol of part, heated and stirred is uniform, and controlling heating-up temperature is 70 DEG C, and the response time is 7h；
Add saturated sodium-chloride and separate out sodium stearate, be warming up to 85 DEG C, add the alkylphenol polyoxyethylene and 0.06 of 0.03 part The phenethyl phenol polyethenoxy ether of part, cold after the alkylsulfonate of 0.05 part and the alkylphosphonic of 0.04 part, fully reaction 2h But to room temperature；
Add the hydrochloric acid of 70 parts being neutralized to PH is 6.8, obtains emulsion and be liquid swelling agent after filtering separation, impurity removal.
Embodiment 4
A kind of microdilatancy type coral sand concrete, its material mixture ratio: 42.5 Portland cements 380 parts, micro-wollastonite powder 25 parts, Coral sand 650 parts, basaltic broken stone 975 parts, 180 parts of sea water, aliphatic water reducing agent 5 parts, liquid swelling agent fills respectively 1.6,2.0,2.4 parts.Stir after 3～4min with machine mixer, pour to 100mm × 100mm × 100mm and In the concrete test die of 100mm × 100mm × 515mm, jolt ramming molding, under the conditions of mark is supported, maintenance is to 3d, 7d and 28d also Measure length and the comprcssive strength of examination body.The tensile strain rate of test specimen uses equation below to calculate:
ϵ t = L t - L L 0 × 100
In formula: εtTensile strain rate during t age, %；
LtExamination body length during t age, mm；
L initial length measured value, mm；
L0Examination body datum length, mm.
Table 1 comprcssive strength and drying shrinkage
Table 1 illustrates: not only increases the comprcssive strength of coral sand concrete after filling appropriate liquid swelling agent, and substantially drops The low drying shrinkage of coral sand concrete；When liquid swelling agent volume is 2.0%, the coral sand concrete of different larval instar Comprcssive strength is best, and drying shrinkage is minimum.
Embodiment 5
A kind of microdilatancy type coral sand concrete, its material mixture ratio: 42.5 Portland cements 400 parts, 42.5 slag silicates Salt cement 80 parts, metakaolin 20 parts, coral sand 675 parts, basaltic broken stone 1035 parts, 195 parts of sea water, polycarboxylic acids subtracts 4.8 parts of water preparation, liquid swelling agent fills 1.5,1.9,2.3 parts respectively.Stir after 3～4min with machine mixer, pour To the concrete test die of 100mm × 100mm × 100mm and 100mm × 100mm × 515mm, jolt ramming molding, support bar in mark Under part, maintenance to 3d, 7d and 28d and measures the examination length of body and comprcssive strength.
Table 2 comprcssive strength and drying shrinkage
Table 2 illustrates: not only increases the comprcssive strength of coral sand concrete after filling appropriate liquid swelling agent, and substantially drops The low drying shrinkage of coral sand concrete, when liquid swelling agent volume is 1.9%, the coral sand concrete of different larval instar Comprcssive strength is best, and drying shrinkage is minimum.
Embodiment 6
A kind of microdilatancy type coral sand concrete, its material mixture ratio: 42.5 composite Portland cements 360 parts, 42.5 slag silicates Salt cement 50 parts, metakaolin 10 parts, ground granulated blast furnace slag 10 parts, coral sand 695 parts, basaltic broken stone 1015 parts, 190 parts of sea water, naphthalene water reducer 5.4 parts, liquid swelling agent fills 1.5,2.0,2.5 parts respectively.Stir with machine mixer After uniform 3～4min, pour to the concrete test die of 100mm × 100mm × 100mm and 100mm × 100mm × 515mm, Jolt ramming molding, under the conditions of mark is supported, maintenance to 3d, 7d and 28d and measures the examination length of body and comprcssive strength.
Table 3 comprcssive strength and drying shrinkage
Table 3 illustrates: be possible not only to improve the comprcssive strength of coral sand concrete after filling appropriate liquid swelling agent, but also bright The aobvious drying shrinkage reducing coral sand concrete；When liquid swelling agent volume is 2.0%, the coral sand coagulation of different larval instar The comprcssive strength of soil is the highest, and drying shrinkage is minimum.

Claims (10)

1. a microdilatancy type coral sand concrete, it is characterised in that composition meter by weight is as follows:
The cement of 300～450 parts, the admixture of 15～45 parts, the coral sand of 600～725 parts, the rubble of 975～1150 parts, 165～205 The sea water of part, the water reducer of 3～7 parts, the liquid swelling agent of 1.5～2.5 parts；
Wherein, the main component of described liquid swelling agent is the emulsion that higher fatty acids generates through saponification.
2. microdilatancy type coral sand concrete as claimed in claim 1, it is characterised in that described liquid swelling agent is by the following method It is prepared:
Adding higher fatty acids, sodium hydroxide, catalyst, and heated and stirred in reaction vessel, temperature controls at 60～75 DEG C, After reaction 5～8h, add saturated sodium-chloride to remove glycerol and to separate out higher fatty acids sodium；Continue to be heated to 75～90 DEG C, add After opacifiers, diffusant, fully reaction 1～2h, it is cooled to room temperature and add hydrochloric acid to be neutralized to pH value be about 7.0, filter and separate Obtain liquid swelling agent.
3. microdilatancy type coral sand concrete as claimed in claim 2, it is characterised in that its raw materials by weight portion meter is as follows:
4. microdilatancy type coral sand concrete as claimed in claim 2, it is characterised in that described higher fatty acids be stearic acid, At least one in palmitic acid, oleic acid, linoleic acid.
5. microdilatancy type coral sand concrete as claimed in claim 2, it is characterised in that described catalyst be ethanol, propanol, At least one in ethylene glycol, propylene glycol.
6. microdilatancy type coral sand concrete as claimed in claim 2, it is characterised in that described opacifiers is fatty alcohol polyoxy second At least one in alkene ether, aliphatic amine polyoxyethylene ether, alkylphenol polyoxyethylene, phenethyl phenol polyethenoxy ether；Described expansion Powder is at least one in alkylbenzenesulfonate, alkylnaphthalene sulfonate, alkylsulfonate, alkylphosphonic.
7. microdilatancy type coral sand concrete as claimed in claim 1, it is characterised in that described cement be Portland cement, One or both in portland slag cement, composite Portland cement.
8. microdilatancy type coral sand concrete as claimed in claim 1, it is characterised in that described admixture is metakaolin, grain Change at least one in blast-furnace cinder micro-powder, SILICA FUME；Described water reducer is polycarboxylate water-reducer, naphthalene water reducer, aliphatic At least one in water reducer, sulfamate water reducer.
9. microdilatancy type coral sand concrete as claimed in claim 1, it is characterised in that the modulus of fineness of described coral sand is 2.5～3.0, bulk density is 1120～1180kg/m3；Described rubble is basaltic broken stone, and bulk density is 1580～1760kg/m3, Crush values is 7～9%, clay content 0.1～0.4%, described basaltic broken stone by 0～5mm, 5～10mm, 10～20mm continuous Graded broken stone forms.
10. the preparation method of the microdilatancy type coral sand concrete described in claim 1, it is characterised in that comprise the following steps:
By the cement of 300～450 parts, the admixture of 15～45 parts, the coral sand of 600～725 parts, the rubble of 975～1150 parts is put In machine mixer after stirring 1～2min uniformly, then the water reducer of 3～7 parts and the liquid swelling agent of 1.5～2.5 parts are mixed all After even, the sea water in company with 165～205 parts is together poured into, continues stirring 1～2min and uniformly prepares microdilatancy type coral sand concrete.
CN201610251919.7A 2016-04-21 2016-04-21 A kind of microdilatancy type coral sand concrete and preparation method thereof Expired - Fee Related CN105837142B (en)

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CN107986650A (en) * 2017-11-30 2018-05-04 嘉华特种水泥股份有限公司 A kind of concrete gel material
CN110171940A (en) * 2019-04-11 2019-08-27 武汉理工大学 A kind of coral sand admixture and its preparation method and application
CN111268962A (en) * 2019-12-02 2020-06-12 哈尔滨工程大学 Dark portland cement concrete for inducing adhesion of marine periphyton and preparation method thereof
CN111875321A (en) * 2020-07-02 2020-11-03 中铁桥研科技有限公司 Underwater repair material based on seawater and coral sand and preparation method thereof
CN112430039A (en) * 2020-12-07 2021-03-02 北京金隅混凝土有限公司 Ultrahigh-performance concrete and preparation method thereof
CN112500091A (en) * 2021-01-22 2021-03-16 湘潭大学 Chloride ion permeation resistant mortar for ocean engineering and preparation method thereof
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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107986650A (en) * 2017-11-30 2018-05-04 嘉华特种水泥股份有限公司 A kind of concrete gel material
CN110171940A (en) * 2019-04-11 2019-08-27 武汉理工大学 A kind of coral sand admixture and its preparation method and application
CN110171940B (en) * 2019-04-11 2021-09-14 武汉理工大学 Coral sand admixture and preparation method and application thereof
US20220144700A1 (en) * 2019-07-24 2022-05-12 Guilin University Of Technology High strength coral concrete and preparation method thereof
CN111268962A (en) * 2019-12-02 2020-06-12 哈尔滨工程大学 Dark portland cement concrete for inducing adhesion of marine periphyton and preparation method thereof
WO2021129019A1 (en) * 2019-12-27 2021-07-01 尹世平 Seawater coral aggregate concrete building block with built-in frp rib skeleton and construction method
CN111875321A (en) * 2020-07-02 2020-11-03 中铁桥研科技有限公司 Underwater repair material based on seawater and coral sand and preparation method thereof
CN111875321B (en) * 2020-07-02 2021-10-22 中铁桥研科技有限公司 Underwater repair material based on seawater and coral sand and preparation method thereof
CN112430039A (en) * 2020-12-07 2021-03-02 北京金隅混凝土有限公司 Ultrahigh-performance concrete and preparation method thereof
CN112500091A (en) * 2021-01-22 2021-03-16 湘潭大学 Chloride ion permeation resistant mortar for ocean engineering and preparation method thereof

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